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diff --git a/system/plugins/captcha_pi.php b/system/plugins/captcha_pi.php
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-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
-/**
- * CodeIgniter
- *
- * An open source application development framework for PHP 4.3.2 or newer
- *
- * @package CodeIgniter
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2010, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
- * @filesource
- */
-
-// ------------------------------------------------------------------------
-
-/*
-Instructions:
-
-Load the plugin using:
-
- $this->load->plugin('captcha');
-
-Once loaded you can generate a captcha like this:
-
- $vals = array(
- 'word' => 'Random word',
- 'img_path' => './captcha/',
- 'img_url' => 'http://example.com/captcha/',
- 'font_path' => './system/fonts/texb.ttf',
- 'img_width' => '150',
- 'img_height' => 30,
- 'expiration' => 7200
- );
-
- $cap = create_captcha($vals);
- echo $cap['image'];
-
-
-NOTES:
-
- The captcha function requires the GD image library.
-
- Only the img_path and img_url are required.
-
- If a "word" is not supplied, the function will generate a random
- ASCII string. You might put together your own word library that
- you can draw randomly from.
-
- If you do not specify a path to a TRUE TYPE font, the native ugly GD
- font will be used.
-
- The "captcha" folder must be writable (666, or 777)
-
- The "expiration" (in seconds) signifies how long an image will
- remain in the captcha folder before it will be deleted. The default
- is two hours.
-
-RETURNED DATA
-
-The create_captcha() function returns an associative array with this data:
-
- [array]
- (
- 'image' => IMAGE TAG
- 'time' => TIMESTAMP (in microtime)
- 'word' => CAPTCHA WORD
- )
-
-The "image" is the actual image tag:
-<img src="http://example.com/captcha/12345.jpg" width="140" height="50" />
-
-The "time" is the micro timestamp used as the image name without the file
-extension. It will be a number like this: 1139612155.3422
-
-The "word" is the word that appears in the captcha image, which if not
-supplied to the function, will be a random string.
-
-
-ADDING A DATABASE
-
-In order for the captcha function to prevent someone from posting, you will need
-to add the information returned from create_captcha() function to your database.
-Then, when the data from the form is submitted by the user you will need to verify
-that the data exists in the database and has not expired.
-
-Here is a table prototype:
-
- CREATE TABLE captcha (
- captcha_id bigint(13) unsigned NOT NULL auto_increment,
- captcha_time int(10) unsigned NOT NULL,
- ip_address varchar(16) default '0' NOT NULL,
- word varchar(20) NOT NULL,
- PRIMARY KEY `captcha_id` (`captcha_id`),
- KEY `word` (`word`)
- )
-
-
-Here is an example of usage with a DB.
-
-On the page where the captcha will be shown you'll have something like this:
-
- $this->load->plugin('captcha');
- $vals = array(
- 'img_path' => './captcha/',
- 'img_url' => 'http://example.com/captcha/'
- );
-
- $cap = create_captcha($vals);
-
- $data = array(
- 'captcha_id' => '',
- 'captcha_time' => $cap['time'],
- 'ip_address' => $this->input->ip_address(),
- 'word' => $cap['word']
- );
-
- $query = $this->db->insert_string('captcha', $data);
- $this->db->query($query);
-
- echo 'Submit the word you see below:';
- echo $cap['image'];
- echo '<input type="text" name="captcha" value="" />';
-
-
-Then, on the page that accepts the submission you'll have something like this:
-
- // First, delete old captchas
- $expiration = time()-7200; // Two hour limit
- $DB->query("DELETE FROM captcha WHERE captcha_time < ".$expiration);
-
- // Then see if a captcha exists:
- $sql = "SELECT COUNT(*) AS count FROM captcha WHERE word = ? AND ip_address = ? AND date > ?";
- $binds = array($_POST['captcha'], $this->input->ip_address(), $expiration);
- $query = $this->db->query($sql, $binds);
- $row = $query->row();
-
- if ($row->count == 0)
- {
- echo "You must submit the word that appears in the image";
- }
-
-*/
-
-
-
-/**
-|==========================================================
-| Create Captcha
-|==========================================================
-|
-*/
-function create_captcha($data = '', $img_path = '', $img_url = '', $font_path = '')
-{
- $defaults = array('word' => '', 'img_path' => '', 'img_url' => '', 'img_width' => '150', 'img_height' => '30', 'font_path' => '', 'expiration' => 7200);
-
- foreach ($defaults as $key => $val)
- {
- if ( ! is_array($data))
- {
- if ( ! isset($$key) OR $$key == '')
- {
- $$key = $val;
- }
- }
- else
- {
- $$key = ( ! isset($data[$key])) ? $val : $data[$key];
- }
- }
-
- if ($img_path == '' OR $img_url == '')
- {
- return FALSE;
- }
-
- if ( ! @is_dir($img_path))
- {
- return FALSE;
- }
-
- if ( ! is_really_writable($img_path))
- {
- return FALSE;
- }
-
- if ( ! extension_loaded('gd'))
- {
- return FALSE;
- }
-
- // -----------------------------------
- // Remove old images
- // -----------------------------------
-
- list($usec, $sec) = explode(" ", microtime());
- $now = ((float)$usec + (float)$sec);
-
- $current_dir = @opendir($img_path);
-
- while($filename = @readdir($current_dir))
- {
- if ($filename != "." and $filename != ".." and $filename != "index.html")
- {
- $name = str_replace(".jpg", "", $filename);
-
- if (($name + $expiration) < $now)
- {
- @unlink($img_path.$filename);
- }
- }
- }
-
- @closedir($current_dir);
-
- // -----------------------------------
- // Do we have a "word" yet?
- // -----------------------------------
-
- if ($word == '')
- {
- $pool = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ';
-
- $str = '';
- for ($i = 0; $i < 8; $i++)
- {
- $str .= substr($pool, mt_rand(0, strlen($pool) -1), 1);
- }
-
- $word = $str;
- }
-
- // -----------------------------------
- // Determine angle and position
- // -----------------------------------
-
- $length = strlen($word);
- $angle = ($length >= 6) ? rand(-($length-6), ($length-6)) : 0;
- $x_axis = rand(6, (360/$length)-16);
- $y_axis = ($angle >= 0 ) ? rand($img_height, $img_width) : rand(6, $img_height);
-
- // -----------------------------------
- // Create image
- // -----------------------------------
-
- // PHP.net recommends imagecreatetruecolor(), but it isn't always available
- if (function_exists('imagecreatetruecolor'))
- {
- $im = imagecreatetruecolor($img_width, $img_height);
- }
- else
- {
- $im = imagecreate($img_width, $img_height);
- }
-
- // -----------------------------------
- // Assign colors
- // -----------------------------------
-
- $bg_color = imagecolorallocate ($im, 255, 255, 255);
- $border_color = imagecolorallocate ($im, 153, 102, 102);
- $text_color = imagecolorallocate ($im, 204, 153, 153);
- $grid_color = imagecolorallocate($im, 255, 182, 182);
- $shadow_color = imagecolorallocate($im, 255, 240, 240);
-
- // -----------------------------------
- // Create the rectangle
- // -----------------------------------
-
- ImageFilledRectangle($im, 0, 0, $img_width, $img_height, $bg_color);
-
- // -----------------------------------
- // Create the spiral pattern
- // -----------------------------------
-
- $theta = 1;
- $thetac = 7;
- $radius = 16;
- $circles = 20;
- $points = 32;
-
- for ($i = 0; $i < ($circles * $points) - 1; $i++)
- {
- $theta = $theta + $thetac;
- $rad = $radius * ($i / $points );
- $x = ($rad * cos($theta)) + $x_axis;
- $y = ($rad * sin($theta)) + $y_axis;
- $theta = $theta + $thetac;
- $rad1 = $radius * (($i + 1) / $points);
- $x1 = ($rad1 * cos($theta)) + $x_axis;
- $y1 = ($rad1 * sin($theta )) + $y_axis;
- imageline($im, $x, $y, $x1, $y1, $grid_color);
- $theta = $theta - $thetac;
- }
-
- // -----------------------------------
- // Write the text
- // -----------------------------------
-
- $use_font = ($font_path != '' AND file_exists($font_path) AND function_exists('imagettftext')) ? TRUE : FALSE;
-
- if ($use_font == FALSE)
- {
- $font_size = 5;
- $x = rand(0, $img_width/($length/3));
- $y = 0;
- }
- else
- {
- $font_size = 16;
- $x = rand(0, $img_width/($length/1.5));
- $y = $font_size+2;
- }
-
- for ($i = 0; $i < strlen($word); $i++)
- {
- if ($use_font == FALSE)
- {
- $y = rand(0 , $img_height/2);
- imagestring($im, $font_size, $x, $y, substr($word, $i, 1), $text_color);
- $x += ($font_size*2);
- }
- else
- {
- $y = rand($img_height/2, $img_height-3);
- imagettftext($im, $font_size, $angle, $x, $y, $text_color, $font_path, substr($word, $i, 1));
- $x += $font_size;
- }
- }
-
-
- // -----------------------------------
- // Create the border
- // -----------------------------------
-
- imagerectangle($im, 0, 0, $img_width-1, $img_height-1, $border_color);
-
- // -----------------------------------
- // Generate the image
- // -----------------------------------
-
- $img_name = $now.'.jpg';
-
- ImageJPEG($im, $img_path.$img_name);
-
- $img = "<img src=\"$img_url$img_name\" width=\"$img_width\" height=\"$img_height\" style=\"border:0;\" alt=\" \" />";
-
- ImageDestroy($im);
-
- return array('word' => $word, 'time' => $now, 'image' => $img);
-}
-
-
-/* End of file captcha_pi.php */
-/* Location: ./system/plugins/captcha_pi.php */ \ No newline at end of file
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